Siemens HNF364R 200-Amp 3 Pole 600-volt 3 Wire Non-Fused Heavy Duty Safety Switches This is a 200 Amp, 3 Pole, 600V, 3 Wire, Non-Fused HD, Type 3R Quick-make, quick-break operating mechanism that ensures positive operation Arc chutes dissipate heat and prolong switch life Hinged clear line terminal shield with probe holes for inspecting or testing line side terminals